Switch-stopping mechanism.



JOHN NEWBERRY REYNOLDS, OF GREENWICH, CONNECTICUT .ASBTGTN'OR. .Yfi" MES ASSIGNMENTS, TO WESTERN ELECTRIC COMEANY, INCQRILIRAIKD, A {J OF NEW YORK.

SWIT CPI-STOPPING MECHANISM.

V Specification of Letters Patent.

Tntnntezl May 23.

Application filed January 29, 1915. Serial Ito. 53%;.

To all whom it nmy concern Be it known that I, Join? NEWBERRY Rar- NOLDS, a citizen of the United States, resid-- ing at Greenwich, in the county of Fairfieltt and State of Connecticut, have invented oertain new and useful Improvements in Switeh-Stopping Mechanism. of which the following is-a full, clear. concise, and exert description.

This inventiourelates to stopping meeh anism for automatic telephone switches. and in the present disclosures is shown applied to a switch of the panel type. although obviously it is equally applicable to switches of other kinds.

The object of this invention is the pro vision of means wherehy a switch carriage, moving at high speed. may he definitely stopped with the switch brushes centrally positioned on the desired Set of contacts.

In the drawings, Figure l is a side elevation of the switch with parts broken away; Fig. 2 shows a section of the stopping device on the line 2--2 of Fig. 3; Fig. 3 is a plan View of the structure shown in Fig. 2: Fig. 4 shows a. section of a modification of the stopping device taken on the line 4-4 of Fig. 5; and. 5 is a plan view of the structure shown in Fig. -1-.

As the switch structure herein disclosed is in general the same as that shown in Patent No. 1 123596, With the" addition of the stopping device which forms the subject of this invention, the general structure of the switch will he only briefly described.

The switch shown in Fig. 1 is of the panel type. This switch comprises a longitudinally movable shaft 1. having a plurality of sets 2, of hrnshes fixed thereto, only two sets being SlIOR 'n in the drawings. Each set of brushes is adapted to traverse a section or group of trunk terminals 3. 4; represents a rotatable drum and 5 is an idler pulley, adapted through the medium of magnet 6, to force the bar 7 into engagement with the power drum 4, whereby the shaft and brushes carried thereby are elevated. Can ried by the shaft 1 is a plurality of interrupter brushes 8, which, in the movement of the switch shaft, are caused to traverse the eon-imitators or interrupters 9 whereby the operation of the switch is governed. The 2 normally held from i ii 1 terminal contacts .l of the hellthe two innermostv brushes 0t set. A

trip rod 11.. aetuatwl by the magnet 16?. is This rod carries a pluralit to. WlllCll a e positioned at i he provided. flexible fingers l" progressively inure mg d canoes from normal position at the horizontal arms f the trip levers. 'lhu during the limmary upward moi meat '2? I t 611 shaft. the roll 11 is wanted. one or the lit gets 13 will operativcly engage its resgz-ec tive trip lever 14, while the remaining trip fingers will pa thrtmgh the line of travel. of their IKEPPCH'W? lriers to the other side thereof. The of washes to he tripped or released. thor ore. depends upon the distance the shaft travels. and consequently on the number of segments of the lowermost left commutator traversed by its respective brush 8. prior to the energrination oz e trip magnet 12. After the trippin" of a. set of brushes. the ele ation of the shaft continued either by the same power drum or by a higlhspeed drum. des ribed in the above mentioned patent.

The return to normal maybe accomplished. either by gravity. upon the release of the brush shaft, or by means of an independent drum similar to 4, which rotates in the on- PO-SlllB direction.

The bar 7. as shown in Figs. and is provided with a series of perforations 35 which are spaeed apart equal to the dis tances between ad acent terminals in the bank 3. Bar 7 pass adjacent to the idler pulley 16 which has its central portion re duced as shown in Figsv 3 and This phi ley cooperates with the stopping mechanism on the opposite side of the shaft, and together therewith forms the subject of this invention. The stopping; mechanism primarily comprises a plunger or plate l3, which, when the switoh has reached the tie-- sired position, is forced into the appropriate perforation whereby the switirh will he stopped with the brushes centrally posh tioned on the set of contacts.

In the modification shown in. Fig. 2, the. plate 18 is formed as a horizontal arm of the bell crank lever 19 which is pivotally secured 4, the electromagnet 25 is 24 is provided with lug 26 of copper or other non-magnetic material, so that the armature will be quickly retracted upon deenergization. of the magnet Secured be tween the lug 27 carried by the frame memher which forms the mounting for the mag net -L: structures and the upper end of the hell crank lever 19 is a spring 28. This spr 1% tends to normally maintain the armature and arts carried thereby in a retracted position. It also tends to hold the plunger or plate 18 in contact with the roller 29. Thus, if while the bar 7 is being moved rapidly upward by a drum such as deenergized. The plunger 18 will be forced outward and the end thereof will pass through one of the perl'orations 15. If the shaft is moving at a high speed. the momentum thereof will cause the plate 18 to be carried upwardly against the tension of the spring 28.

screw 30, projecting downwardly from the lug 27 is provided to limit this upward movement. Ordinarily, however, the overthrow will not be sufficient to carry the plate 18 into engagement with the screw 30. After this overthrow. the plate or plunger 18 will be immediately returned to its normal position in engagement with roller- 29 by means of the tension ofspring 28. It is of course understood that the electromagnet 25 in an energized condition during the ma'n'einent of the switch shaft and that in stopping current is cut off from the drive clutch magnet as 6 at the same instant as iron the stop magnet The modification shown in Fig. 4 has ex actly the same function as the structure shown in Fig. 2, but difi'ers therefrom somewhat as to structural details. In this modification the plunger 31 is pivotally supported between the in-turned edges of the plate 32 which is pivotally supported on the pin 33 carried by the supporting frame work. The

plunger 31 is held in position against the roller 29 at its lust by means of the spring 34 secured lower end to the pin 35, supported an: the dges of the plate 32, and at its cured to the plunger 31. The armature 37 is pivotally mounted on the pin 33. Projecting from the plate 32 is scrcw'threaded stud 38 which extends through the perforated upper end of the armature 37. The armature 37 is held in adjustable spaced re lation to the plate 32 by means of the spring 39, surrounding the stud 38 between the ar mature and said plate and the nuts 40 on the opposite side of the armature. The armature is normally held in retracted position by means the spring 41 secured at one end to the log 42 carried by the frame. and at the other end to the member 43, adjustahly secured to the plate 32. The outward or retractile movement of the armature is sponding to the with the brushes thereof in engagement 1; end to a member 86 adiustably se-- limited by means of the pin 44 carried by the supportingframe.

By means of the invention above described, a switch may be operated at a very high rate of speed and the brushes positively stopped and centrally positioned on the desired set of contacts without excessive jar or pounding. For while the positioning of the plunger in the perforation 15, corredesired stationary contacts, insures that the brushes will be centrally positioned on said contact, temporary overrun is permitted by means of the spring 28 in Fig. 2 and spring 3 in Fig. 4, but this overrun is immediately corrected by the action of the springs in returning the member 18 into engagement with the roller 29.

As it is obvious that many modifications may be made in my invention, without departing from the spirit thereof, I desire it understood that my invention shall be limited merely by the scope of the following claims.

What is claimed is:

1. In a telephone switch, a support, brushes thereon, a row of sets of contacts, means for moving said support to cause said brushes to traverse said contacts, a series of recesses in said support spaced apart distances equal to the distances between corresponding contacts of said row, and a plunger for engagement with any one of said recesses to positively stop forward movement of the brushes on the corresponding set of contacts.

2. In a telephone switch, a shaft, a brush thereon, a row of contacts, means for moving said shaft longitudinally to cause said brush to traverse said contacts, a series of recesses in said shaft corresponding to the contacts of said row, and a member for engagement with any one of said recesses to stop the forward movement of said shaft with a desired contact.

3. In a telephone switch, a support, brushes thereon, a row of contacts, means for moving said support to cause said brushes to traverse said contacts, a series of recesses in said support spaced apart distances equal to the distances between corresponding contacts of said rows, a menibcr for engagement with any one of said recesses to positively stop forward movement of the support with the brushes on the corresponding set of contacts, a tension device tending to maintain said member in its operative position, and an electromagnet for moving said member to its inoperative position.

4.. In a telephone switch, a support, brushes thereon, a row of sets of contacts, means for moving said support to cause said brushes to traverse said contacts, a series of recesses in said support corresponding to the sets of contacts in said row, a plunger for engagement with any one of said recesses to positively stop forward movement of the brushes on the corresponding set of contacts, a stop for preventing n'iovement of said plunger beyond its normal position in one direction but allowing it to be moved in the direction of forward movement of said shaft, and a tension device tending to maintain said member in engagement with said stop.

5. In a telephone switch, a shaft, brushes thereon, a row of sets of contacts, means for moving said shaft to cause said brushes to traverse said contacts, a series of recesses in said shaft corresponding to the contact sets of said row, a member for engagement with any one of said recesses to stop the forward movement of said shaft, a stop for preventing movement of said member beyond its normal position in one direction but allowing it to be moved in the direction of forward movement of said switch, an electromagnet for moving said member to inoperative position and a tension device tending to maintain said member in its operative position and in engagement with said stop.

6. In a telephone switch, a support,

brushes thereon, a row of sets of contacts, 30

means for moving said support to cause said brushes to traverse said contacts, a series of recesses in said support corresponding to the sets of contacts in said row, an

electromagnet, an armature for said magnet,

a bell crank lever pivotally secured to said armature, a plunger formed as one arm of said bell crank and arranged for engagement with said recesses when said armature is retractEH /a stop for preventing vice acting on the other arm of said bell crank to normally maintain said armature retracted and said plunger in engagement with said stop.

In witness whereof, I hereunto subscribe my name this 28th day of January, A. D.

JOHN N EWBERRY REYNOLDS.

l/Vitnesses:

E. EDLER, K. L. STAHL. 

